<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="loginout">退出</el-button>
      </el-header>
      <!-- 页面主体区 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px': '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
       <el-menu background-color="#333744" text-color="#fff" 
       active-text-color="#409eff" unique-opened :collapse="isCollapse"
       :collapse-transition="false" :router="true" :default-active="activePath">
         <!-- 一级菜单 -->
      <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id" @click="saveNavState('/'+subItem.path)">
        <template slot="title">
          <i :class="iconsObj[item.id]" class="iconfont"></i>
          <span>{{item.authName}}</span>
        </template>  
        <!-- 二级菜单 -->
          <el-menu-item :index="'/'+subItem.path+''" v-for="subItem in item.children" :key="subItem.id">
            <template slot="title">
          <i class="el-icon-menu"></i>
          <span>{{subItem.authName}}</span>
        </template>  
          </el-menu-item>
      </el-submenu>
    </el-menu>
      </el-aside>
      <!-- 右侧内容 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  created(){
     this.getMenuList()
     this.activePath = window.sessionStorage.getItem('activePath')
  },
  data() {
    return {
      menulist: [],
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  methods: {
    loginout() {
      window.sessionStorage.clear() //清空token
      this.$router.push('/login')
    },
     // 点击切换按钮折叠侧边栏
    toggleCollapse(){
      this.isCollapse = ! this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    },
    async getMenuList(){
    const {data: res} = await this.$http.get('menus')
    if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
    this.menulist = res.data
    }
  }
}
</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  background-color: #373d41;
  div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-menu {
  border-right: none;
}
.el-aside {
  background-color: #333744;
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 5px;
}
.toggle-button {
  background-color: #4a5064;
  color: #fff;
  font-size: 10px;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
